66 



DE. E. E. GATES— CONTEIBTJTION TO A 



t 



Plate 4. 



Fig. 44. Rosette of 0. semilata or 0. /a/a from Lancashire. * 



45. Lancashire Oenotheras^ a race of O. grandiflora from Lancashire. Rosette in tropical hot- 



house^ age 4 months, 



46. Same as last, 6 weeks later, A new type of rosette-leaf has appeared, which is characteristic 



of O. ffrandiflora, but is usually omitted altogether in ordinary cultures of this species, 



47. O. grandiflora race from Lancashire. Mature rosette in hothouse^ age 9 months. 



CI fig. 46. 



48. Adult plant of 0. grandiflora from Alabama, under ordinary conditions of culture at Mo. Bot. 



Garden. It produces no rosette but branches freely^ giving the plant a shrubby 

 appearance, 



49. Buds^ two-thirds natural size^ from a Lancashire race of 0. grandiflora. They are smooth and 



free from hairsj rounded_, with thin papery sepals. Cf. fig. 24. 



50. Rosette of a race of 0. biennis from New York State ; photographed from a culture at "Woods 



Hole, Mass- This pure race was used in my hybrids with 0. LamarcUana and other 

 forms • 



51. Flowering shoot of the same. 



52. Shoot of the same in fruit, showing capsules and bracts. 



53. Buds of the same, two-thirds natural size, showing diminution in size of bracts. 



54. Broad-leaved rosette of O. muricata from Nova Scotia. 



row-leaved rosette of O. muricata from Winnipeg, Manitoba. Both these races occur 

 together with identical characters in both these localities. See text, p. 40. 

 n^ering stage of broad-leaved type of 0. muricata from Winnipeg. It will be seen that the 

 rosette is identical with fig. 54, but reduced in size in reproduction. 



Plate 5. 



Na 



Fig 



narrow-leaved races of 0. muricata, such as represented in the next figure, 

 ette of a uniform race of 0. muricata from Seal Harbour. Maine. 



59. Lancashire Oenotheras. 



No 



and 0. semilata^ age 9 months. This plant was fertile. See text. 



60. Lancashire Oenotheras, No. 8. Rosette in tropical hothouse, age 9^ months. 



61. Same culture as last. No. 18, age 4 months. 



62. Same culture as last. No. 22, age 5 months, a dwarf rosette with characteristic type 



of leaf. 



63. Lancashire Oenotheras, No. 23. Eosette in tropical hothouse, age 4 months. Cf. fig. 45, 



from which it difi'ers in having longer petioles and narrower blades. 



64. Lancashire Oenotheras^ No. 25. Rosette in tropical hothouse, age 9| months. This has 



since given rise to a characteristic race. (^Cf. 

 ame culture as last. No. 33, age 9^ months. 

 'ype 2 in F^ from No. 5 of Lancashire Oenother; 



O. elliptica. See p. 45, 

 ^ype 4 in Fi from No. 5 of Lancashire Oenother: 

 short style. See p. 45. 



The rosette closely resembles DeVries's 



small 



68. A pan of seedlings showing the Fi from 0. lata x 0. nanella. The forms represented are 



nanella 



See text. 



p. 50. 



69. Rosette of 0. biennis x 0. LamarcTciana, F^, broad-leaved or laeta form. 



70. Rosette of O. biennis x O. Lamarckiana, Pi, narrow-leaved or velutina form. 



